`bind:this` can't access `#each` context

[mrkishi]

Regular prop bindings can access {#each}'s context variables. bind:this bindings, on the other hand, can't!

See: https://svelte.dev/repl/519146588bef40c1aeb8c564bb6d1d33

[primos63]

This seems to have been partially solved by issue #2333. However it introduced another issue. You can toggle the display on and off, but when toggling the display off an error is thrown. Once that happens clicking the button does nothing. Funny because I was also working on 2333 and my changes have this issue functioning as expected. Not sure if it was something in the fix for 2333 or another fix included in 3.5.4.

Error:
Uncaught (in promise) TypeError: Cannot set property 'ref' of undefined
at Object.component_binding (eval at handle_message (VM108 about:srcdoc:13), :766:16)
at Object.destroy [as d] (eval at handle_message (VM108 about:srcdoc:13), :605:12)
at destroy_each (eval at handle_message (VM108 about:srcdoc:13), :45:31)
at Object.destroy [as d] (eval at handle_message (VM108 about:srcdoc:13), :548:8)
at eval (eval at handle_message (VM108 about:srcdoc:13), :164:27)
at run (eval at handle_message (VM108 about:srcdoc:13), :18:16)
at Array.forEach ()
at run_all (eval at handle_message (VM108 about:srcdoc:13), :24:13)
at check_outros (eval at handle_message (VM108 about:srcdoc:13), :147:13)
at Object.update [as p] (eval at handle_message (VM108 about:srcdoc:13), :705:9)
component_binding @ VM111:766
destroy @ VM111:605
destroy_each @ VM111:45
destroy @ VM111:548
(anonymous) @ VM111:164
run @ VM111:18
run_all @ VM111:24
check_outros @ VM111:147
update @ VM111:705
update @ VM111:132
flush @ VM111:107
Promise.then (async)
schedule_update @ VM111:87
make_dirty @ VM111:212
(anonymous) @ VM111:246
click_handler @ VM111:761

[Rich-Harris]

Fixed in 3.6.2: https://svelte.dev/repl/519146588bef40c1aeb8c564bb6d1d33?version=3.6.2